公开(公告)号：US5159059A

公开(公告)日：1992-10-27

申请号：US529295

申请日：1990-05-29

申请人： James M. Balkovec ,  Regina C. Black

发明人： James M. Balkovec ,  Regina C. Black

IPC分类号： C07K1/02 ,  C07K1/113 ,  C07K1/14 ,  C07K7/56 ,  C07K14/37 ,  C07K14/41 ,  C12P17/18 ,  C12P21/04 ,  C12R1/725

CPC分类号： C07K7/56 ,  Y10S435/913

摘要： Process for producing a compound of the formula ##STR1## by selectively reducing a compound of the formula ##STR2## in a strong acid medium with excess molar equivalent of reducing agent so that the OH adjacent to X.sub.1 is reduced to H and if Q is OH in the starting material, it optionally may be reduced H.